5 years ago

High-performance bipolar plate of thin IrOx-coated TiO2 nanotubes in vanadium redox flow batteries

High-performance bipolar plate of thin IrOx-coated TiO2 nanotubes in vanadium redox flow batteries
Thin DSA (dimensionally stable anode) bipolar plates designed to replace thick graphite were employed for the first time to obtain improved dimensions, and electrochemical catalytic properties in all-vanadium redox flow batteries (VRFBs). We found that a 0.127mm-thick DSA consisting of nanotubular TiO2 on Ti substrate coated with a layer of IrOx worked extremely well as a bipolar plate. Using this material, overpotential and charge transfer resistance for charging and discharging were reduced due to the catalytic properties of IrOx, which improved the transfer of electrons or the electrical current. Furthermore, the stability of the IrOx layer on the TiO2 nanotubular structure grown from the Ti substrate was confirmed after 100 cycles. The efficiency of the VRFB based on the DSA bipolar plate increased by 3–4% compared to that of the graphite bipolar plate, suggesting that this thin DSA bipolar plate offers not only dimensional advantages, but also electrochemical advantages for VRFB applications.

Publisher URL: www.sciencedirect.com/science

DOI: S0920586117304595

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.